(Hom. xxvi. 3) They are words of gentleness, not of anger; a lesson to us, when we: argue and cannot converse, not by sore and angry words, but by the absence of anger and clamour, (for clamour is the material of anger,) to prove the soundness of our views. Jesus in entering upon high doctrines, ever checks Himself in compassion to the weakness of His hearer: and does not dwell continuously on the most important truths, but turns to others more humble. Whence it follows: If I have told you earthly things, and ye believe not, how shall ye believe if I tell you of heavenly things.
(Hom. xxvii. 1) Or thus: Be not surprised at His calling Baptism earthly. It is performed upon earth, and is compared with that stupendous birth, which is of the substance of the Father, an earthly birth being one of mere grace. And well hath He said, not, Ye understand not, but, Ye believe not: for when the understanding cannot take in certain truths, we attribute it to natural deficiency or ignorance: but where that is not received which it belongs to faith only to receive, the fault is not deficiency, but unbelief. These truths, however, were revealed that posterity might believe and benefit by them, though the people of that age did not.
The expression "earthly things," some say is here used of the wind; that is, "If I have given you an example from earthly things, and ye did not even so believe, how shall ye be able to learn sublimer things?" And wonder not if He here call Baptism an "earthly" thing, for He calls it so, either from its being performed on earth, or so naming it in comparison with that His own most awful Generation. For though this Generation of ours is heavenly, yet compared with that true Generation which is from the Substance of the Father, it is earthly.
He does not say, "Ye have not understood," but, "Ye have not believed"; for when a man is ill disposed towards those things which it is possible to apprehend by the intellect, and will not readily receive them, he may justly be charged with want of understanding; but when he receives not things which cannot be apprehended by reasoning, but only by faith, the charge against him is no longer want of understanding, but unbelief. Leading him therefore away from enquiring by reasonings into what had been said, He touches him more severely by charging him with want of faith. If now we must receive our own Generation by faith, what do they deserve who are busy with their reasonings about that of the Only-Begotten?
"If I have told you earthly things, and ye believe not; how shall ye believe, if I tell you heavenly things?" What earthly things did He tell, brethren? "Except a man be born again;" is that an earthly thing? "The Spirit bloweth where it listeth, and thou hearest its voice, and knowest not whence it cometh, or whither it goeth;" is that earthly? For if He spoke it of the wind, as some have understood it, when they were asked what earthly thing the Lord meant, when He said, "If I told you earthly things, and ye believe not; how shall ye believe, if I tell you heavenly things?" Now what did He name earthly? He was speaking of the spiritual birth; and going on, saith, "So is every one that is born of the Spirit." Then, brethren, which of us does not see, for example, the south wind going from south to north, or another wind coming from east to west? How, then, know we not whence it cometh and whither it goeth? What earthly thing, then, did He tell, which men did not believe? Was it that which He had said about raising the temple again? Surely, for He had received His body of the earth, and that earth taken of the earthly body He was preparing to raise up. They did not believe Him as about to raise up earth. "If I told you earthly things," saith He, "and ye believe not; how shall ye believe if I tell you heavenly things?" That is, if ye believe not that I can raise up the temple cast down by you, how shall ye believe that men can be regenerated by the Spirit?
(Tr. xii. in Joan. c. 7) That is: If ye do not believe that I can raise up a temple, which you have thrown down, how can ye believe that men can be regenerated by the Holy Ghost?
A doctrine, saith He, not exceeding the understanding befitting man, ye from your extreme folly received not, and how shall I explain to you things more Divine? For they who in their own matters are most foolish, how shall they be wise in matters above them? And they who are powerless as to the less, how shall they not find the greater intolerable? And if, says He, ye believe not Me being Alone in speaking, but seek many witnesses for every thing, whom shall I bring to you as a witness of the heavenly Mysteries?
If you out of extreme foolishness did not receive a doctrine that does not exceed the understanding human beings are capable of, how can I explain things more divine? For if people are foolish in their own matters, how do they expect to be wise in matters above them? How do those who are powerless in lesser matters expect to find the greater things intolerable? And if, he says, you do not believe me when I speak alone but rather seek many witnesses for everything, whom shall I bring to you as a witness of the heavenly mysteries?
[AD 407] John Chrysostom on John 3:12
(Hom. xxvii. 1) Or thus: Be not surprised at His calling Baptism earthly. It is performed upon earth, and is compared with that stupendous birth, which is of the substance of the Father, an earthly birth being one of mere grace. And well hath He said, not, Ye understand not, but, Ye believe not: for when the understanding cannot take in certain truths, we attribute it to natural deficiency or ignorance: but where that is not received which it belongs to faith only to receive, the fault is not deficiency, but unbelief. These truths, however, were revealed that posterity might believe and benefit by them, though the people of that age did not.